Riveting-machine



H. C. GILES.

RIVETING MAcHmE.-

APPLICATION FILED JUNE 21,1920.

H. C. GILES.

RIVETING MACHINE.

APPLICATION man JUNE 21.1920.

LQQ. Patented 00h 18, 1921.

2 SHEETS-SHEET 2.

.l 56 iI HNVENTO @amg/6'" WITNESSES:

www?" ATTORNEYS.

PATENT OFFICE.

HARVEY C. GILES, OF ROCHESTER, NEW YORK.

RI'VETING-MACHINE.

Specication of Letters Patent.

Patented Oct. 1-8, 1921.

Application led June 21,1920. Serial No. 390,560;.

zen of the United States of America, resid-- ing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Riveting-h/Iachines, of which the following is a full, clear, and exact specication.

This invention relates to riveting 'machines, and more particularly to machines for light riveting work for joiningthin sheets of material and has for its object to provide a machine which will strike the work each time with a uniformv blow; another object is to provide a machine using a trip hammer for striking the rivet, means being provided for adjusting the weightof the blow; still another object is to provide a machine which can easily be operated man-4 ually; a further object is to provide a machine in which a pad descends upon and holds the work in place before the hammer is operated; and a still further object is to provide a. machine which can be used. by an unskilled operator successively; and other objects will hereinafter appear. l

In the accompanying drawings, in which like reference characters designate like parts:

Figure 1 is -a section through a. machine constructed in accordance with, and ll'lustrating one embodiment of my invention, parts being shown in elevation;

Fig..2 is a plan view of the 'machine shown in Fig. 1; t

Fig. 3 is a side elevation of the-same ma-v chine, the hammer being raised t o strike a blow;

Fig. 4 is a fragmentary section of a work pad which may be used with my machine; and

Y Fig. 5 is a detail section'through one type of hammer weight, taken on line 5-5 of Fig. 3.

In the embodiment of my invention shown, a base 1 carries a standard 2, from which an arm 3 extends forwardly' over the base. The arm 3 is apertured through thel central portion 4, and terminates in a cylindrical bearing 5. The top of the standard 1s forked, the sides 6 and 7 forming bearings 8 and 9 for two levers. The top lever 10 serves as a hammer, andthe lower lever 11 is for setting and tripping the hammer and for moving the work-holding pad.

To actuate the hammer lever 10, there is a latch 12, pressed against a stop 13, by.a spring 14, the latch being pivoted to lever 10 by a pin 15. These parts all t into a recess 16 cut into the side of lever 10. The latch 12 contacts with a cam lug 17 which here is shown as being formed of a metal disk 18 which is fastened tolever 11 by pins 19. Lever 11 is in the form of a yoke having an extended arm 20 on one end which supports one end of a spring 21 upon a hook 22. The other end of spring 21 is fastened to vbase 1 by an eyelet 21. The arms 23 and 24 of lever 11 contain elongated bearings 25 and 26 vwhich slide about stub shafts 27 and 2S carried by ears 30 and 31 of a tubular sliding member 29. This construction provides a clear space or opening through which the hammer may strike the. plunger 32 which slides through a bearing 33 in the top of the cylinder 29. There is a head 34 on the lower end of plunger 32 which slides in cylinder 5() with a loose fit, so that air is not compressed by its movement. Air vents may be made in head 34, if desired, but I have not found this necessary, the loose it being cheaper to make and satisfactory in operation. Arms 23 and 24 of lever 11 are connected by a bridge 35 carrying on its under side an eyelet 36 to which a cable 37 is attached, the other end of the cable being fastened to a foot treadle, not shown. Just behind bridge 35 there is a base 38 in which a spring terminal 39 is fastened, a. nut 40 permitting the adjusting of a spring 41 attached tolevers 10 and 11. A pin 42 holds one end of a spring 41 in the slot 43 of lever 10. As cable 37 is drawn down lever .11 will cause the sliding cylinder 29 to move toward base 1, while at the same time latch 12 is rotatecl through cam lug 17 until the hammer reaches the position shown in Fig 3. In this position the work pad 44 is in contact with the workl 45, hold1ng it in position. By continuing thedownward movement of lever 11 the latch 12 rides over the top of the cam lug or dog 17, :so lthat it drops, the weight of the lever and tension of the spring determining the blow.

-The speed with whic-h the foot treadle is operated can not affect the stroke of the hammer, so that each time a uniform blow is delivered. If a ,heavier blow is desired, the spring 41 may be put under greater tension,"but generally I refer-to alter the weight of, or change t e leverage of, the hammer weight. In Fig. 1, this is accom- ,46 in an aperture 47 drilled in arm 10.

plishedv by means of inserting a weight plug a tubular member 50'slidable in member 29,

whichin turn slides in bearing 5 supported from the base. The sliding movement of member 29 relative to bearing 5 is limited by a pin 51 in the bearing extending into a slot 52 in member 29. There is also a pin-53 carried by member 29 which limits the movement 0f member 50 through the slot 54 in member 50. A' coiled spring 5 5 tends to keep member 50 toward the base 1. The bottom of member 50 is threaded at 56 to take a work-holding pad 44, shown in Fig. 1 as being provided with a tool guideway 57, and a reduced work contacting face 58. The tool 75 is mounted on a disk 59 loosely slid ing in member 50, in such a' position that the disk 59 is struck by the plunger when the hammer descends. In Fig. 1 the disk 59 and tool 75 are shown resting against the head 34 on the end of plunger 32 because this is the position of these parts before the tool is operated. It should be noted, however, that normally when'the work holder is raised, the tool 75 will be extending down from the holder as shown in dotted lines. When lever 11 lowers pad 44 the tool- 75 will strike first,

and, having no pressure 4upon disk 59, will move to the position shown in full lines, from which position it is struck by the hammer mechanism. Thisl movement oftool 75 is useful, because, in some classes of work it assists in placing the work properly, acting as a centering tool. Any desired number of tools can be carried by providing a special wlth a reclprocatmg work-hold1ng pad, of

disk 59 and holding pad 44, in Fig. 4 a twin riveting` tool being shown, the disk 59 carryingtools 60 and 61, while the work holder has twin guideways 62 and 63, and holding pads 64 and 65. -Various tools can be readily adjusted, by merely screwin on an end 44, suited to the particular jo `to the member 50.

The work 45, is carriedupon a' table- 68 whichy is provided with adownwardly extending stem69 which frictionally engages in a slot 70 in base 1. In`the4 form illustrated theaperture 70 is circular in cross section,

although sometimes it is desirable to make it s0 that the table stem 69 can not turn in the aperture, so that a square or other shaped opening can be advantageously used.

, -The operation of my machine is as follows:l An operator selects a disk 59 with a A tool suited to his work, and, after placing these in cylinder 50, screws on pad. 44. The desired weight 46 is then placed on the-hammer and the machine is ready for use. The work 45 is then placed upon table 68, and the foot lever depressed pulling down on cable 37 thereby causing lever 11 to revolve on its pivot 9. The work pad 44 descends at the same time hammer l() is ascending from the table,

reaches the work 45 spring 55 is slightly compressed byfurther downward movement of lever 11, so that the work is held firmly in position. Continuing'the movement of the foot treadle the parts reach the position shown in Fig. 3, at which point latch 12 hammer 10 being actuated through latch 12 and dog 17. When the pad 44.

rides over the cam 17, causing the hammer to sharply strike the plunger 32, which, through head 34, strikes disk 59, thereby delivering a blow upon tool 75. This` cycle of operations can be very rapidly performed, a uniform blow being struck regardless of the speed of actuation of the machine.

Usually it is customary to have a work centering device on table 68, but where special work is being done, lever 1l can be slowly depressed so that the work can be adjusted over table 68 manually and centered by tool 75,.which, upon further depressing of lever 11, will be moved up into the position from which it is struck, shown in Fig. 1.

I do not wish to limit myself to the machine illustrated since it will be obvious to those skilled in the art that certain changes can be made without departing from the spirit of'my invention. For instance, the device can be readily operated manuallyby hand instead of by foot as described, or if desirable, it may be run by power, a suitable clutch being interposed between the 'source of ower and the actuating lever l1.

aving thus described myinvention what I claim as new and desire to secure by Letters Patent is:

1. In a riveting machine, the combination a riveting tool conned path by the the work-hol to a predetermined ad, a lever for reciprocating lngpad, and a hammer for striking the riveting tool, the lever actuat-y ing the hammer.

2; In a riveting machine, the combination with a reciprocating pad, of a plunger carried by the pad, a lever for reciprocating lthe pad, and a hammer forstnking the'. plunger, means carried by the lever for set- (pacha lever for reciprocating 4. In a trip hammer for riveting work, the combination with atool mounted inatool holder, of a lever for positioning the tool withrespect to the work, and a hammer having an operative and an inoperative position, the lever causing the hammer to rotate away from the work intoan operative position from which it will drop to strike the tool. a

5. In a tri hammer for riveting work, the combination with al tool mounted in a tool holder, of a lever for positioning the tool with respect to the work, and a hammer having an operative and an inoperative position, the lever causing the hammer to rotate away from the work into an operative position from which it will dro to strike the tool, and means on the lever or tripping the hammer.

6. In a trip hammer 'for riveting machines, the combination with a tool mounted .to reciprocate above the work, of a base, a. lever and a hammer both pivotedto the base, means for applying power to one of the pivoted members sothat. the hammer and the lever will first rotate in opposite directions about their p'ivots and then rotate in the same direction, thereby causing the hammer to strike the tool.

7. In a trip hammer for riveting machines, the combination with a riveting tool, of a hammer for actuating the tool,l a base carrying the hammer, and a lever pivoted to the base, means for moving the hammer from the base as the tool is positioned, and means for tripping the hammery after the tool is positioned.

8. In a trip hammer for riveting machines, the combination with a base, of a riveting 'tool -slidably mounted above the base, a lever and a hammer both pivoted to the base, a connection between the lever and hammer tending to hold them together and a connection between the lever and hammer by which theywill be rotated apart when power is applied to one of them, said last mentioned connection being adapted to automatically release the hammer so that it may movev toward the lever tostrike the riveting tool.

9. In a trip hammer for riveting machines, the combination with a base, ofy a tool movably mounted above the base, a lever and a hammer pivoted to the base, one carrying a latch and the other a do means for raising the hammer through tlie. latch and dog and means 'for tripping the hammer at a predetermined elevation, whereby the hammer will strike the tool.

10. In a riveting machine, the combination with a riveting tool, of avwork holding pad mounted to reciprocate above the work, a lever for moving thel pad, the work holding pad comprising three telescoping cylinders, two movable with respect to the third, means tending to hold the movable cylinders apart, and means forv limiting the lever in one position, and a hammer mountv ed on the base, a springconnecting the lever and the hammer, means for moving the lever to carry the riveting tool toward the base.

said movement placing the Asprings under tension. I

12. In a riveting machine, the combination with a base, a riveting tool mountedto move over the base, of a lever having an operative and an inoperative position, a spring for normally holding the lever in its inoperative position, a hammer carried by the base movable into and out of an operative position, and a sprin for normally holding the hammer out o operative position, and means for moving the lever to bring the riveting tool toward the base, thereby putting both springs under tension, so that when the lever moving means is released the parts will return to their inoperative positions. l 13. In a riveting machine the combination with a base, of a bearing supported .by the base, a sliding work pad carrled in the bearing, a tool slidably carried by the work pad, V

and a lever for moving the said ad and tool toward and from the base, av ammer carried by the base and movable to and from a striking osition, and means for varying the force o the blow struck by the hammer in descending from its striking position upon the tool.

14. In a trip hammer for riveting mav chines, the combination with 'a base, of a hammer, adapted to' move up and down with respect to the base, a fpivot connecting imparting an up and down movement to the hammer. v y

15. In a trip' hammer for riveting machlnes, the combination with a base, havin a work table thereon, of a hammer carrie p by the base and movable to and from the. work table, a riveting4 tool slidably mounted above the work table, and means for lowering the riveting tool to the work on the.

said means also raising`V the hammer table a to strike the so that it will drop by gravity rivetin tool.

16. n a trip hammer for riveting machines, the combination with a base, having base for striking the riveting tool, and a a Work table thereon, of a hammer carried lever for moving said riveting tool, an ad- -byithe base and. movable to and from `the justable spring connecting the hammer and 30 work table, a riveting tool slidably mounted the lever, the movement ofthe lever in poslabove the work table, and means for lowertioning the riveting tool raising the hammer ing the riveting tool to the work on the table, and releasing it to strike the riveting tool, said means also raising the hanimerso that the adjustment of the spring permitting the vit will drop by gravity to strike the riveting force of the blow lt0 be varied. 35

tool, and means carried by the hammer for -19..In a trip hammer for riveting mavarying the force of the blow, chines the combination with a base, carry- 17. In a -trip hammer for riveting maing a work table, of a riveting tool mounted chines, the l-combination with a base,- having to slide to and from the Work table, a hama Worktable thereon, of a riveting tool\ mer 'pivoted'to' the base so as to move to 40 mounted on the base movable to and from and from the riveting tool :for striking the y the lwork table, a hammer pivoted to the base riveting tool, and a lever for positioning the for striking the riveting tool, and a lever work tool, said/lever moving the hammer for moving said riveting tool, the downward vand the riveting tool away from each other movement of the lever raising the hammer during the first part of the positioning of 45 and releasing it to strike the riveting tool, the riveting tool and then releasing the hamand means forcontrolling the force of the mer to strike the riveting tool, there being blow delivered by the hammer by varying means for adjusting lthe force of the blo'w the weight thereof. struck by' the hammer comprising an ad- `153.111 a trip hammer for riveting majustable weight andan adjustable spring.' 50

chinesthe combination with a base, having Signed at Rochester, New York, this 16th a work table thereon, of va riveting tool day ofv June, 1920. mounted on ,the base movable to and from v the work table; a hammer pivot/ed to the HARVE'Y C. GILES. 

